HTC has rescheduled the Android 4.0 update for the HTC Sensation handsets, which means users will now have to wait somewhat longer to upgrade to the Ice Cream Sandwich Experience.

Initially, the Taiwan-based phone manufacturer had announced that they would be releasing the Android 4.0 ICS upgrade for the HTC Sensation by the end of March. But then almost two months have gone past and now the company has announced that the update is still about a month away. The official announcement made recently says the update will not be available before some time towards the end of next month.

The new release schedule for the updates show that the company is planning the roll out of these updates between March and June this year for HTC Sensation. The schedule for HTC Sensation XL is between April and June. So there’s just one month to go before their own officially announcement time frame runs out. HTC has also endeavored to address customer frustration at the lack of upgrades and has offered explanations as to why the upgrades are taking so long. Here’s part of the company’s explanation: -

“Our goal is to make sure that an upgrade provides an equal or improved customer experience and that means a high standard of quality for hardware compatibility, adapting device or carrier specific customizations, testing by HTC and partners, addressing device hardware constraints, and many other factors,”

The newly released list also contains timelines for other Android handsets — HTC Evo 3D, HTC Rhyme and HTC Desire HD. The first two are set to be upgraded between June and July this year. HTC Desire HD will get updated between June and August. There will be no official upgrades for the HTC Salsa, Chacha, Explorer or Flyer.

HTC has also announced that the upgrades will nto bring the Sense UI 4.0 alonside Android 4.0. The company has not given out any official reasons for this except for a lack of “dedcated hardware” in some of its devices but it is clear that the older phones are not equipped to handle both Android 4.0 ICS and HTC Sense UI 4.0 at the same time. They are both resource intensive and might hamper phone performance. However, it is also possible HTC is saving the Sense UI 4.0 as an extra for those who are investing in the new handsets that are coming out with Android 4.0 pre-installed.

According to HTC, Sense UI 4.0 requires dedicated hardware that is not yet available in all of its devices. This might be just another way of saying that some of its older phones are not powerful enough to handle the new UI overlay.

This new push for upgrade the HTC Sensation, Sensation XL and other phones comes from the fact that Android 5.0 is about to debut sometime later this year (rumors). Every Android manufacturer is trying to push out Android 4.0 upgrades before moving on to Android 5.0.